| | Preston, ID | Fort Mohave, AZ | United States |
| Population | 5,545 | 15,872 | 329,725,481 |
| Female Population | 46.0% | 51.1% | 50.5% |
| Male Population | 54.1% | 48.9% | 49.5% |
| Median Age | 38.6 | 56.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,240 | 14,422 | 309,327,143 |
| Population - 2000 | 4,682 | 8,965 | 285,036,114 |
| Population - 1990 | 3,710 | 3,183 | 251,960,433 |
| Pop. 2000 to Now | 21.3% | 72.5% | 15.6% |
| Pop. 1990 to Now | 53.1% | 385.7% | 30.8% |
| space4 | | | |
| Population Density | 816.0 | 950.6 | 93.4 |
| Land Area | 6.8 | 16.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Preston, ID | Fort Mohave, AZ | United States |
| Age 0 to 4 | 4.8% | 2.9% | 5.9% |
| Age 5 to 9 | 11.8% | 3.3% | 6.1% |
| Age 10 to 14 | 6.8% | 6.2% | 6.6% |
| Age 15 to 17 | 4.3% | 2.1% | 3.9% |
| Age 18 to 20 | 3.8% | 1.8% | 4.0% |
| Age 21 to 24 | 2.9% | 2.3% | 5.2% |
| Age 25 to 34 | 12.2% | 7.6% | 13.8% |
| Age 35 to 44 | 12.4% | 8.9% | 12.9% |
| Age 45 to 54 | 10.2% | 12.0% | 12.6% |
| Age 55 to 59 | 8.8% | 8.5% | 6.7% |
| Age 60 to 64 | 6.5% | 9.9% | 6.3% |
| Age 65 to 74 | 8.1% | 22.6% | 9.6% |
| Age 75 to 84 | 5.8% | 10.0% | 4.5% |
| Age 85 and over | 1.5% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Preston, ID | Fort Mohave, AZ | United States |
| White | 89.3% | 72.7% | 59.4% |
| Black | 0.0% | 1.1% | 12.2% |
| Asian | 0.0% | 2.5% | 5.6% |
| Native American | 1.3% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 1.9% | 0.2% |
| Other | 1.3% | 0.4% | 0.4% |
| Two or More Races | 3.2% | 4.6% | 3.2% |
| Hispanic | 4.8% | 16.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Preston, ID | Fort Mohave, AZ | United States |
| Married Population | 59.7% | 58.5% | 49.8% |
| Currently Married | 59.6% | 56.9% | 48.0% |
| Married but Separated | 0.1% | 1.6% | 1.8% |
| Single Population | 40.3% | 41.5% | 50.2% |
| Never Married | 20.8% | 15.2% | 33.8% |
| Divorced | 12.6% | 16.6% | 10.8% |
| Widowed | 6.8% | 9.7% | 5.6% |
| space5 | | | |
| Household Size | 2.73 | 2.37 | 2.60 |
| Households | 2,010 | 6,698 | 124,010,992 |
| Family Households | 1,473 | 4,768 | 80,755,759 |
| Married couple, w/children | 32.5% | 19.6% | 30.5% |
| Married couple, no children | 50.2% | 59.1% | 42.9% |
| Non Family Households | 537 | 1,930 | 43,255,233 |
| Single householder, w/children | 14.6% | 10.4% | 15.8% |
| Single householder, no children | 2.8% | 10.9% | 10.8% |